Bicycle-brake



(No Model.) 7 v L. 0. HALL. BICYCLE BRAKE" No. 594,947. Patented Dec. 7,1897.

, UNITED STATES PATENT OFFICE.

LINCOLN O. HALL, OF BURLINGTON, IOWA.

BICYCLE-BRAKE.

SPECIFICATION forming part of Letters Patent No. 594,947, dated December 7, 1897.

Application filed July 18, 1896, Serial No. 599,616. (No model.)

To otZZ whom it may concern.-

. Beit known that I, LINCOLN C. HALL, a citi My invention relates to bicycle-brakes, the

object of the same being to provide a foot-operated brake the shoe of which is adapted to bear against the main sprocket-wheel of the machine.

The invention consists of a sprocket-wheel having an extra rim formed thereon, a brakeshoe slidingly mounted on the lower line tube of the bicycle frame and adapted to bear against the rimof said sprocket-wheel, and a pair of rods or pitmen pivoted at their outer ends to said brake-shoe and said lower line tube, respectively, and at their'inner ends to each other.

The invention also consists in other details of construction and combinations of parts, which will be hereinafter more fully described and claimed.

In the accompanying drawings, forming part of this specification, Figure 1 represents a side elevation of a part of a bicycle, showing my brake applied thereto. Fig. 2 is an edge view of the main sprocket-wheel of thebicycle.

Like reference numerals represent like parts in both views.

The sprocket-Wheel l is of the usual form of construction, except that it has a supplemental rim 2, forged or cast thereon, having a smooth outer surface. Mounted to slide upon the lower line tube 3 of the bicycleframe is a sleeve 4, having the brake-shoe secured to its lower end, the same being adapted to be brought into engagement with the rim 2 of the sprocket-wheel. Pivoted to the sleeve 4 and extending upwardly therefrom at a slight angle to the tube 3 is a rod or pitman 6, having pivoted to its upper end a rod or pitman 7, which is in turn pivoted to a collar 8 upon the tube 3. A foot-piece 9 may be attached to the pitmen 6 and 7 at their point of connection for the purpose of operating the brake. A spring 10 is attached to the tube 3 and to the sleeve 4 thereon for the purpose of holding the brake-shoe normally out of engagement with the rim 2 of the sprocketwheel.

The parts of my device are normally in the position in which they are illustrated in Fig. 1. When it is desired to stop the motion of the machine, the foot of the operatoris pressed upon the foot-piece 9, throwing downwardly the pitman 6, the sleeve 4, and the brake-shoe 5, forcing the latter into engagement with the rim 2 of the sprocket and braking the machine.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a bicycle-brake, the combination with the main sprocket-wheel of a bicycle having a supplemental rim thereon, of a brake-shoe slidingly mounted upon the lower line tube of the bicycle-frame and adapted to be thrown into engagement with said supplemental rim, and a pair of pitmen pivoted at their outer ends to said brake-shoe and to said tube respectively and at their inner ends to each other, substantially as described.

2. In a bicycle-brake, the combination with the main sprocket-wheel of the bicycle having a supplemental rim forged or cast thereon, of a sleeve slidingly mounted on the lower line tube of the bicycle-frame, a brake-shoe secured to said sleeve and adapted to be thrown into engagement with said supplemental rim, a pair of pitmen pivoted at their outer ends to said sleeve and to said tube respectively and at their inner ends to each other, asprin g for normally holding said brake-shoe out of engagement with said supplemental rim, and a foot-piece connected tosaid pitmen at their pivotal point, substantially as described.

In testimony whereof I have signed this specification in the presence of two subscrib- 

